Summary & Overview
CPT 75820: Supervision & Interpretation of Venous Flow Imaging, One Extremity
CPT code 75820 covers the supervision and interpretation of radiologic studies assessing venous blood flow in a single extremity. This code is used when a qualified provider reviews and reports on imaging that examines venous circulation in either the left or right upper or lower limb. Nationally, accurate use of this code supports consistent documentation and billing of diagnostic vascular imaging services that inform clinical decisions for conditions such as suspected deep vein thrombosis or venous insufficiency.
Key payers in the national landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how 75820 is applied clinically, typical settings where the service is delivered, and the payer mix relevant to nationwide reimbursement practices. The publication includes benchmarks for utilization where available, common modifier considerations listed in payer policies, and clinical context linking the procedure to diagnostic pathways for venous disease.
This summary provides practical context: what the code represents, why it matters for diagnostic care and claims processing at scale, and what topics the full publication addresses — including service definitions, payer coverage patterns, and policy updates affecting the use of CPT code 75820.
Billing Code Overview
CPT code 75820 describes the supervision and interpretation of radiologic imaging to evaluate blood flow in the veins of a single extremity (left or right, upper or lower). This service is a diagnostic vascular imaging interpretation performed by a qualified provider.
-
Service type: Diagnostic vascular imaging supervision and interpretation
-
Typical site of service: Hospital outpatient department, outpatient imaging center, or ambulatory surgical center where radiologic vascular studies are performed
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred to vascular imaging for suspected deep venous thrombosis (DVT) or venous insufficiency in a single extremity. The patient presents to an outpatient vascular lab or hospital radiology department with unilateral leg swelling, pain, erythema, or nonhealing venous ulceration. Prior to the procedure, a referring clinician documents history, focused physical exam, and indications (for example, acute swelling after immobilization or progressive varicosities). The technologist performs sonographic or contrast venographic acquisition of the affected limb under supervision. The interpreting provider (radiologist, vascular surgeon, or interventional radiologist) supervises image acquisition as required, reviews cine loops and still images, provides real‑time feedback to the technologist as needed, and issues a formal interpretation and report documenting anatomy, presence or absence of thrombus, reflux, stenosis, or collateralization. The procedure typically occurs in an outpatient vascular laboratory, hospital radiology suite, or inpatient bedside setting for critically ill patients. Results guide acute management such as anticoagulation, thrombolysis, endovascular intervention, or conservative care and are routed to the referring clinician and included in the permanent medical record.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation/supervision portion separate from technical component. |